What is the objection to hedonism?
things good for you acc. to hedonism: eating, drinking, sex, laziness, (7 deadly sins, basically) — pigs can do this

But these too are good for you
Art, poetry, philosophy, deep personal relationships — pigs cannot do this

The Swine Objection

If hedonism were correct, then the best life for a human being is the life of engaging in piglike activities (see above) and not engaging in distinctively human activities

but the life of engaging in piglike activities and not engaging in distinctively human activities is not the best life for a human being to live

therefore, hedonism is not correct

Mill rejects premise 1 above; accepts premise 2. Reason: we can experience pleasure from engaging in distinctively human capacities, where pigs cannot, and furthermore, the pleasures we get from engaging in these distinctive human capacities are better than the pleasures we get from engaging in the piglike capacities.